This is due to the review comment in bug 754141 comment 18 not being applied.
Patch in a moment.
I said r=cjones because he sent me this exact patch via e-mail as a suggested fix. So if you prefer, author=cjones, r=me. :)
*** Bug 757403 has been marked as a duplicate of this bug. ***
As said in bug 757403, I very likely had issues when merging my patches...